Metal–carbonyl and metal–nitrosyl complexes. Part V. The crystal and molecular structure of the tricarbonylchromium derivative of methyl benzoate

Abstract

X-Ray analysis of the tricarbonylchromium derivative of methyl benzoate shows that in the crystal the molecule adopts the configuration in which the carbonyl–chromium vectors of the tricarbonylchromium group point towards the 1-, 3-, and 5-positions of the benzene ring. This result supports the proposition that the orientation of the tricarbonylchromium moiety in a tricarbonylchromium substituted-benzene reflects the electron-withdrawing or electron-releasing character of the benzene substituent. The average chromium–carbon distances to the benzene and carbonyl groups are, respectively, 2·22 and 1·85 Å.